CN215263752U - Long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped - Google Patents

Long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped Download PDF

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CN215263752U
CN215263752U CN202120650167.8U CN202120650167U CN215263752U CN 215263752 U CN215263752 U CN 215263752U CN 202120650167 U CN202120650167 U CN 202120650167U CN 215263752 U CN215263752 U CN 215263752U
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circuit
current
sampling
voltage
resistor
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陈文�
赵玉祥
田磊
赵丹丹
张雷
许莉
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SHAOXING TESTING INSTITUTE OF QUALITY TECHNICAL SUPERVISION
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SHAOXING TESTING INSTITUTE OF QUALITY TECHNICAL SUPERVISION
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12—Remote or cooperative charging

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Abstract

The utility model provides a long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped, belongs to electric automobile and fills electric pile measurement quality monitoring technology field. The utility model discloses a sampling module, sampling CPU and DTU communication module, the battery charging outfit is connected to the sampling module, gathers the current-voltage of battery charging outfit in-process to with current-voltage transmission to sampling CPU, sampling CPU receives the current-voltage that the sampling module gathered, carries out the electric energy total mark to current-voltage, acquires the electric energy value, and transmits the electric energy value through DTU communication module. The utility model discloses an alternating current-direct current integral type monitoring makes it possess non-vehicle machine and the alternating-current charging stake's that charges monitoring function simultaneously, can satisfy the requirement to the check out test set degree of accuracy in national verification regulation and the detection standard, simultaneously the utility model discloses still possess long-range synchronous transmission's function.

Description

Long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped
Technical Field
The utility model belongs to the technical field of electric automobile fills electric pile measurement quality monitoring, specifically relate to a long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped.
Background
Along with the deep implementation of national new forms of energy electric automobile policy, the electric automobile facility that charges increases fast, and electric automobile fills electric pile industry's operational mode and establish on internet basis mostly, has unified operation platform to carry out daily operation of charging. The state unifies an alternating current-direct current charging interface and a communication protocol through thirteen-five planning, and at the present stage, governments in various places are gradually building government cloud platforms in order to conveniently monitor the metering quality performance of charging piles. Under the market background, the traditional measurement quality supervision mode is difficult to meet the real-time and efficient requirement of market supervision.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
The utility model discloses solve the technical problem that above-mentioned prior art exists, provide a long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped.
The above technical problem of the present invention can be solved by the following technical solutions: the sampling module is connected with the charging equipment, collects current and voltage in the charging process of the charging equipment and transmits the current and voltage to the sampling CPU, the sampling CPU receives the current and voltage collected by the sampling module, performs electric energy integration on the current and voltage, acquires an electric energy value, and transmits the electric energy value through the DTU communication module.
Preferably, the sampling module includes a dc voltage signal sampling circuit for acquiring dc voltage during charging of the charging device, a dc current signal sampling circuit for acquiring dc current during charging of the charging device, an ac voltage signal sampling circuit for acquiring ac voltage during charging of the charging device, and an ac current signal sampling circuit for acquiring ac current during charging of the charging device, and the dc voltage signal sampling circuit, the dc current signal sampling circuit, the ac voltage signal sampling circuit, and the ac current signal sampling circuit may measure separately or measure simultaneously.
Preferably, the dc voltage signal sampling circuit includes a resistance voltage dividing circuit, a programmable gain amplifying circuit, an ADC conversion circuit, and an ADC reference voltage circuit, wherein the resistance voltage dividing circuit divides the dc voltage into small signals, and the small signals are amplified by the programmable gain amplifying circuit and then input to the ADC conversion circuit in full scale for analog-to-digital conversion.
Preferably, the dc current signal sampling circuit includes a zero-flux current sensor, a sampling resistor, a programmable gain amplifier circuit, an ADC conversion circuit, and an ADC reference voltage circuit, and the zero-flux current sensor measures a dc current at the sampling resistor, and the dc current is amplified by the programmable gain amplifier circuit and then input to the ADC conversion circuit in full scale for analog-to-digital conversion.
Preferably, the alternating voltage signal sampling circuit comprises a resistance voltage division circuit, a programmable gain amplification circuit, an ADC conversion circuit, and an ADC reference voltage circuit, wherein the resistance voltage division circuit divides the alternating voltage into small signals, and the small signals are amplified by the programmable gain amplification circuit and then input to the ADC conversion circuit in full scale for analog-to-digital conversion.
Preferably, the alternating current signal sampling circuit comprises an active compensation current transformer, a sampling resistor, a programmable gain amplification circuit, an ADC conversion circuit, and an ADC reference voltage circuit, wherein the active compensation current transformer measures an alternating current on the sampling resistor, and the alternating current is amplified by the programmable gain amplification circuit and then input to the ADC conversion circuit in a full-scale manner for analog-to-digital conversion.
Preferably, the active compensation current transformer comprises a primary winding, a secondary winding, a compensation winding, an excitation winding and a compensation circuit, the compensation winding and the excitation winding are respectively connected with the compensation circuit, the secondary winding is connected with a sampling resistor, the sampling resistor comprises a high-current gear resistor and a low-current gear resistor, the sampling resistor is controlled and selected by a relay, and the resistance value of the low-current gear resistor is 10 times that of the high-current gear resistor.
Preferably, the circuit further comprises a signal isolation circuit, wherein the signal isolation circuit is used for isolating the analog part signal interfering the digital part signal when the CPU receives the current voltage.
Preferably, the system further comprises a PC human-computer interaction module, wherein the PC human-computer interaction module is in communication connection with the sampling CPU, and the PC human-computer interaction module is an industrial-grade all-in-one machine.
Preferably, the DTU communication module comprises a controller MCU and a wireless module, the controller MCU is connected with the wireless module, the wireless module is provided with an SIM card interface, the controller MCU is provided with an RS-485 communication module and/or an RS-232 communication module, and the controller MCU is connected with the sampling CPU through the RS-485 communication module and/or the RS-232 communication module.
The utility model discloses beneficial effect who has: the utility model discloses an alternating current-direct current integral type monitoring makes it possess non-vehicle machine and the alternating-current charging stake's that charges monitoring function simultaneously, can satisfy the requirement to the check out test set degree of accuracy in national verification regulation and the detection standard, simultaneously the utility model discloses still possess long-range synchronous transmission's function. The utility model discloses a hardware is gathered to with the long-term accumulation of corresponding software cooperation, cloud platform monitoring data, can form the battery charging outfit of standard and charge the monitoring curve, and the standard database, finally realize the long-range big data supervision of battery charging outfit's measurement quality correlation performance.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of an application of the present invention;
fig. 3 is a schematic structural diagram of the DTU communication module of the present invention;
fig. 4 is a schematic diagram of an active compensating current transformer of the present invention;
fig. 5 is a schematic diagram of a circuit structure of the compensation circuit of the present invention;
fig. 6 is a schematic diagram of an application of the sampling resistor in the ac current signal sampling circuit according to the present invention.
In the figure: 1. a charging device; 2. a cloud platform; 3. sampling a CPU; 4. a DTU communication module; 5. a DC voltage signal sampling circuit; 6. a DC current signal sampling circuit; 7. an alternating voltage signal sampling circuit; 8. an alternating current signal sampling circuit; 9. a signal isolation circuit; 10. and a PC (personal computer) man-machine interaction module.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b): a remote intelligent metering quality monitoring device for an electric vehicle charging device is shown in figures 1-6 and is used for being connected with a charging device 1 and a cloud platform 2 and establishing communication connection between the charging device 1 and the cloud platform 2, namely, the device, the cloud platform 2 and the charging device 1 work through a unified communication protocol. When the charging device 1 charges the electric automobile, the device is connected between the charging device 1 and the electric automobile. The charging equipment 1 is in communication connection with the cloud platform 2, and the charging equipment 1 comprises an off-board charger and an alternating-current charging pile.
The device comprises a sampling module, a sampling CPU3 and a DTU communication module 4, wherein the sampling module is connected with the charging equipment 1, collects the current and voltage in the charging process of the charging equipment 1 and transmits the current and voltage to the sampling CPU 3; the sampling CPU3 receives the current and voltage collected by the sampling module, performs electric energy integration on the current and voltage to obtain an electric energy value, transmits the electric energy value to the cloud platform 2 through the DTU communication module 4, the cloud platform 2 compares the electric energy value with an electric energy indicating value fed back by the charging equipment 1 to obtain an error value, and the charging equipment 1 is judged according to the measurement quality monitoring result of the error value. The verification basis is the verification regulations and the detection standards of the existing and effective 'electric automobile alternating-current charging pile' and 'electric automobile off-board charger' in China.
The sampling module comprises a direct current voltage signal sampling circuit 5 for collecting direct current voltage in the charging process of the charging equipment 1, a direct current signal sampling circuit 6 for collecting direct current in the charging process of the charging equipment 1, an alternating current voltage signal sampling circuit 7 for collecting alternating current voltage in the charging process of the charging equipment 1 and an alternating current signal sampling circuit 8 for collecting alternating current in the charging process of the charging equipment 1, wherein the direct current voltage signal sampling circuit 5, the direct current signal sampling circuit 6, the alternating current voltage signal sampling circuit 7 and the alternating current signal sampling circuit 8 are all provided with a plurality of channels, the direct current voltage signal sampling circuit 5, the direct current signal sampling circuit 6, the alternating current voltage signal sampling circuit 7 and the alternating current signal sampling circuit 8 can respectively measure independently or simultaneously according to actual requirements, the application is flexible.
The direct-current voltage signal sampling circuit 5 comprises a resistance voltage division circuit, a programmable gain amplification circuit, an ADC (analog-to-digital converter) conversion circuit and an ADC reference voltage circuit, wherein the resistance voltage division circuit divides direct-current voltage into small signals, and the small signals are amplified by the programmable gain amplification circuit and then input to the ADC conversion circuit in a full-scale mode for analog-to-digital conversion. The resistance adopts a UPR system metal film resistance with low temperature coefficient and high precision produced by Niger company, and the temperature coefficient is 2 ppm/DEG C. The ADC conversion circuit adopts full-scale input, and sampling accuracy is improved. The ADC reference voltage circuit supplies power to the ADC conversion circuit, adopts ultra-precise low-noise ADR421, and has good long-term stability which can reach 50ppm/1000 h. The selection of the devices ensures the stability of the analog input signal and improves the stability and the accuracy of the metering device.
The direct current signal sampling circuit 6 comprises a zero magnetic flux current sensor, a sampling resistor, a programmable gain amplification circuit, an ADC (analog to digital converter) conversion circuit and an ADC reference voltage circuit, wherein the zero magnetic flux current sensor measures direct current on the sampling resistor, and the direct current is amplified by the programmable gain amplification circuit and then input to the ADC conversion circuit in a full-scale mode for analog-to-digital conversion. The zero-flux current sensor is based on magnetic-electric conversion, depends on strong nonlinearity of a magnetic material, adopts two flyback direct current magnetic cores and one alternating current induction magnetic core to achieve flux balance, and has extremely high measurement dynamic range and precision, and the measurement accuracy of wide-range current is ensured by 2ppm of zero offset, 2ppm of linearity and 0.1ppm/k of temperature drift coefficient. In the dc current signal sampling circuit 6, the other circuits use the same components as those of the dc voltage signal sampling circuit 5.
The alternating voltage signal sampling circuit 7 comprises a resistance voltage division circuit, a programmable gain amplification circuit, an ADC (analog to digital converter) conversion circuit and an ADC reference voltage circuit, wherein the resistance voltage division circuit divides alternating voltage into small signals, and the small signals are amplified by the programmable gain amplification circuit and then input to the ADC conversion circuit in a full-scale mode to perform analog-to-digital conversion. The ac voltage signal sampling circuit 7 uses the same components as the dc voltage signal sampling circuit 5.
The alternating current signal sampling circuit 8 comprises an active compensation current transformer, a sampling resistor, a programmable gain amplification circuit, an ADC (analog to digital converter) conversion circuit and an ADC reference voltage circuit, wherein the active compensation current transformer measures alternating current on the sampling resistor, and the alternating current is amplified by the programmable gain amplification circuit and then input to the ADC conversion circuit in a full-scale mode for analog-to-digital conversion. The active compensation current transformer is provided with a compensation winding, an excitation winding and a compensation circuit besides a conventional primary winding and a conventional secondary winding, and the main iron core achieves zero magnetic flux through the compensation circuit so as to improve the accuracy. The compensation winding and the excitation winding are respectively connected with the compensation circuit, the primary winding is used as an input winding, the secondary winding is used as an output winding, and the secondary winding is connected with the sampling resistor. The sampling resistor comprises a large-current gear resistor and a small-current gear resistor, and is controlled and selected by a relay, and the resistance value of the small-current gear resistor is 10 times that of the large-current gear resistor. In the ac current signal sampling circuit 8, the other circuits use the same components as the dc voltage signal sampling circuit 5.
In the charging process, particularly during the last trickle charging with small current, the gear needs to be switched to a small current gear for the accuracy of measurement, and according to the continuity required by charging, the conventional current transformer cannot adopt a mode of primary side gear shifting of the transformer, so that an open circuit state is generated, and the accumulation of electric energy is influenced. As shown in fig. 6, the active compensation current transformer of the metering device adopts a mode of switching a sampling resistor on the secondary side of the transformer, when a large current flows, the current passes through the primary side of the transformer, an induced current is generated secondarily, and is converted into a sampling voltage through a resistor R218// a resistor R221, and then enters an ADC conversion circuit after being amplified by a PGA205AU programmable gain amplifier in a proper amount; when the current is reduced and is lower than 10% of the large-current gear range, the relay K1 is automatically switched off, the sampling resistor is changed into a resistor R218, and the sampling voltage of the PGA205AU programmable gain amplifier is still met due to the value relation R218 being 10 (R218// R221). By adopting the design, the measurement accuracy in low current is effectively ensured.
Programmable gain amplifying circuits in the direct current voltage signal sampling circuit 5, the direct current signal sampling circuit 6, the alternating current voltage signal sampling circuit 7 and the alternating current signal sampling circuit 8 are all independently sampled and are not interfered with each other, the gain multiplying power can be automatically adjusted according to measurement data, and the measurement accuracy is improved.
The sampling CPU3 employs an STM32F4xx series processor of the ST corporation's 32-bit ARM core, providing Cortex at 168MHz operating frequencyTMThe performance of an M4 kernel is realized, a 32-bit multiplier and divider are arranged in the M4 kernel, and a single-precision floating point operation unit is arranged in the M4 kernel, so that the efficiency of discrete Fourier transform operation is improved, and the ripple of a direct current system and the harmonic measurement of an alternating current system are ensured.
The DTU communication module 4 comprises a controller MCU and a wireless module, the controller MCU is connected with the wireless module, the wireless module is provided with an SIM card interface, the DTU communication module 4 uploads data information to the cloud platform 2 through a 4G network, the controller MCU is provided with an RS-485 communication module and/or an RS-232 communication module, and the controller MCU is connected with the sampling CPU3 through the RS-485 communication module and/or the RS-232 communication module. And the controller MCU is also provided with an indicator light for displaying the connection state.
The cloud platform 2 takes the limit values of the metering and quality detection results of the charging equipment 1 in the national verification regulations and detection standards as the threshold values of the cloud platform 2 for starting the early warning software, so that the daily monitoring of the metering accuracy and the quality of the charging equipment 1 in the market and the monitoring of the product quality are facilitated.
The device also comprises a signal isolation circuit 9, wherein the signal isolation circuit 9 is used for isolating the analog part signal of the interference digital part signal when the sampling CPU3 receives the current and the voltage. The signal isolation circuit 9 adopts the magnetic coupling of ADI company, has the characteristics of low power consumption, high transmission rate, transient common mode rejection capability of 25KV/us and pulse width distortion less than 3ns, and can effectively reduce the interference of analog part signals to digital part signals.
The device also comprises a PC (personal computer) man-machine interaction module 10, wherein an RS-232 communication module is arranged on the PC man-machine interaction module 10 and is in communication connection with the sampling CPU3 through the RS-232 communication module. The PC man-machine interaction module 10 adopts an industrial grade all-in-one machine, has rich port configuration, small volume, low power consumption and strong stability, adopts a Windows system and has high software adaptation degree.
When the device is used, a charging gun of the charging equipment 1 (an off-board charger or an alternating current charging pile) is connected to an input end socket of the device to ensure reliable connection, a vehicle to be charged is connected with an output end socket of the device by using a matched double-gun line, and the connection state of the charging equipment 1 is checked; after the connection is ready, the card is swiped to start the charging equipment 1, and the to-be-charged equipment 1 and the to-be-charged vehicle enter an energy transmission charging stage after interaction is completed.
The device measures the charging voltage and the charging current of the charging equipment 1 in real time. After the analog data is converted into digital data by the ADC conversion circuit, the digital data is read by the sampling CPU3 and stored in a corresponding register, and is transferred to the memory by DMA. The interrupt processing program stores the frequency data in respective arrays and adopts double arrays to store alternately. In the main cycle program, when it is detected that the storage of one cycle of data is completed, the corresponding voltage, current, power factor, power and the like are obtained by calculation, the accumulated electric energy and the total electric energy of the secondary charging are integrated over time according to the measured active power, then the accumulated electric energy and the total electric energy are compared with the electric energy indication value output by the charging device 1 during the secondary charging, and an error value is calculated by using a word walking method.
From the time of starting the device, the sampling CPU3 communicates with the cloud platform 2 in real time through the DTU communication module 4, after message interaction is subjected to secondary handshake, connection success is confirmed, then the validity of connection is ensured through a heartbeat mechanism, and real-time monitoring data are uploaded
To sum up, the utility model discloses an alternating current-direct current integral type monitoring makes it possess the non-vehicle machine that charges and the alternating current charging stake's of charging monitoring function simultaneously, can satisfy the requirement to the check out test set degree of accuracy in national verification regulation and the detection standard, simultaneously the utility model discloses still possess long-range synchronous transmission's function. The utility model discloses a hardware is gathered to with the long-term accumulation of corresponding software cooperation, cloud platform monitoring data, can form the battery charging outfit of standard and charge the monitoring curve, and the standard database, finally realize the long-range big data supervision of battery charging outfit's measurement quality correlation performance.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.

Claims (9)

1. The device for monitoring the remote intelligent metering quality of the charging equipment of the electric automobile is characterized by comprising a sampling module, a sampling CPU (Central processing Unit) and a DTU (data transfer Unit) communication module, wherein the sampling module is connected with the charging equipment, collects current and voltage in the charging process of the charging equipment and transmits the current and voltage to the sampling CPU;
the sampling module is including the direct current voltage signal sampling circuit who is arranged in gathering the battery charging outfit charging process direct current voltage, the direct current signal sampling circuit who is arranged in gathering the battery charging outfit charging process direct current, the alternating current voltage signal sampling circuit who is arranged in gathering the battery charging outfit charging process alternating voltage and be used for gathering the alternating current signal sampling circuit of battery charging outfit charging process alternating current, direct current voltage signal sampling circuit, direct current signal sampling circuit, alternating current voltage signal sampling circuit, alternating current signal sampling circuit can measure alone respectively or simultaneous measurement.
2. The device of claim 1, wherein the dc voltage signal sampling circuit comprises a resistor voltage divider circuit, a programmable gain amplifier circuit, an ADC converter circuit, and an ADC reference voltage circuit, the resistor voltage divider circuit divides the dc voltage into small signals, and the small signals are amplified by the programmable gain amplifier circuit and then input to the ADC converter circuit at full scale for analog-to-digital conversion.
3. The device as claimed in claim 1, wherein the dc signal sampling circuit comprises a zero-flux current sensor, a sampling resistor, a programmable gain amplifier circuit, an ADC converter circuit, and an ADC reference voltage circuit, the zero-flux current sensor measures the dc current at the sampling resistor, and the dc current is amplified by the programmable gain amplifier circuit and then input to the ADC converter circuit in full scale for analog-to-digital conversion.
4. The device of claim 1, wherein the ac voltage signal sampling circuit comprises a resistor voltage divider circuit, a programmable gain amplifier circuit, an ADC converter circuit, and an ADC reference voltage circuit, the resistor voltage divider circuit divides the ac voltage into small signals, and the small signals are amplified by the programmable gain amplifier circuit and then input to the ADC converter circuit in full scale for analog-to-digital conversion.
5. The device of claim 1, wherein the ac current signal sampling circuit comprises an active compensation current transformer, a sampling resistor, a programmable gain amplifier, an ADC converter, and an ADC reference voltage circuit, the active compensation current transformer measures the ac current at the sampling resistor, and the ac current is amplified by the programmable gain amplifier and then input to the ADC converter for a full-scale ADC conversion.
6. The remote intelligent metering quality monitoring device for the charging equipment of the electric automobile according to claim 5, wherein the active compensation current transformer comprises a primary winding, a secondary winding, a compensation winding, an excitation winding and a compensation circuit, the compensation winding and the excitation winding are respectively connected with the compensation circuit, the secondary winding is connected with a sampling resistor, the sampling resistor comprises a large-current gear resistor and a small-current gear resistor, and is controlled and selected by a relay, and the resistance value of the small-current gear resistor is 10 times that of the large-current gear resistor.
7. The apparatus according to claim 1, further comprising a signal isolation circuit, wherein the signal isolation circuit is configured to isolate an analog portion of the digital portion of the analog signal from the digital portion of the digital signal when the sampling CPU receives the current and voltage.
8. The remote intelligent metering quality monitoring device for the electric vehicle charging equipment as recited in claim 1, further comprising a PC human-computer interaction module, wherein the PC human-computer interaction module is in communication connection with the sampling CPU, and the PC human-computer interaction module is an industrial-grade all-in-one machine.
9. The remote intelligent metering quality monitoring device for the charging equipment of the electric automobile according to claim 1, wherein the DTU communication module comprises a controller MCU and a wireless module, the controller MCU is connected with the wireless module, the wireless module is provided with an SIM card interface, the controller MCU is provided with an RS-485 communication module and/or an RS-232 communication module, and the controller MCU is connected with the sampling CPU through the RS-485 communication module and/or the RS-232 communication module.
CN202120650167.8U 2021-03-30 2021-03-30 Long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped Active CN215263752U (en)

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Application Number Priority Date Filing Date Title
CN202120650167.8U CN215263752U (en) 2021-03-30 2021-03-30 Long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120650167.8U CN215263752U (en) 2021-03-30 2021-03-30 Long-range wisdom measurement quality monitoring of electric automobile battery charging outfit is equipped

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